Furnace



A. SMALLWOOD.

FUHNACE.

APPLICATION FILED MAR. 8, 1920.

A. SMALLWOOD.

FURNACE.

APPL|cAT|oN man Mms, 1920.

1,396,943. Patented Nov. 15, 1921.

3 SHEETS-SHEET 2.

W lia f A. SMA'LLWOOD.

FURNACE. APPLICATION FILED MAR. 8,' |920.

Patented Nov. 15, 1921.

. ...Hamm

al R UNET ALFRED sMALLWooD, on HIGHGATE, Lennon, ENGLAND.

FURNAGE.

Application led March 8, 1920. Serial No. 364,267.

To all whom t may concern:

Be it known that I, ALFRED SMALLwooD, a Subject of the King of Great-Britaim're siding at 42 Hargrave Park, Highgate, London, N., in the county of Middlesex, England, metallurgist, have invented certain new and useful mprovements in or Relating to Furnacesof which thev following is :a specification. j

VThis invention comprises certain improvements in or relating'to furnaces, and isY particularly applicable for the heating of long articles such as .angle and channel irons for ship building.

According to the present invention, the

-air for combustion is heated by a sectional recuperator system located longitudinally below the workingchamber, said recuperator system being fed' by the wasteV gas at a plu-` rality of points in the length of the furnace, as forfinstanceat both ends, and at one or more intermediate positions. The cold air is also admitted to the recuperator Ysystem ata plurality of positions advantageously at positions intermediately to the waste gas admission positions. Between the sectional recuperator system and the working vcharnber a common or sectional green gas flue is Aprovided which is fed by a gas producer or pluralityY of gas producers advanta-v geously located at the side of the furnace.

In order that this invention may be clearly understood tand readily carried into practice, reference mayv be'had to the appended explanatory drawings, on 'whichz-l Figure ll is a sectional plan of a furnace constructed according tothe present invention, the plane ofsection of the` left-hand half of the ligure being Vonfline l -3l. of Fig. 3, andthat von the right-hand side of the figure ,being on line 3 4 of Fig, 3. Y

Fig. 2 is alsectional plan onlineT-S of Fig. 3. I

Fig. 3 isa sectional elevation of the furnace shown in Fig. l, the plane yof section being on the lines 5-6 of Fig. l.

Fig. 4 is apart-sectional elevation of the furnace on the line 9-l0 of Fig. 3.I Y p In a convenient embodiment ofthe invention, as illustrated in the drawings, a is the working chamber and b is the main green gas fluewhich may extend the full length ofthe working chamber,.and which is fed bytwo gas producers c, c; From this green gas flue at intervals around its length a ports.

series of ports or ,passages d extend to the one side ofthe working chamber, these ports or passages being advantageously individually regulable. On the other side of the working chamber there'are a plurality of waste gas outlets e. There may, for instance, be one rwaste gas outlet at each extremity and one at amid-position in the length of the' furnace. Vv-These waste gas/outlets also may be individually regulable. The waste gas outlet'at the mid-position in the length of the V'furnace mayv branch, as indicated at f, Fig. '1, and communicate by up flues g with two recuperator flues 7L extending in each opposite direction longitudinally ofthe furnace.` The wastev gas outlet c at each end ofthe furnace mayreceive the waste gas by way of a transverse flue from ports u in theI vfloor of the working chamber as well as by wayof the lateral outlet o. v' Each endwaste gas outlet c'rmay'communicate with two recuperator iues, as'indicated at ,-and by way of two up lues jextending toward the center vof the furn'aceto a point in proximity to ythe termination of the flues v; extending from the central waste gas outlet, so that at positions intermediately to the waste gas outlets c, from the working chamber, Vthe waste, gas outlets Z, m from the recuperator occur. In the vincinity ofthe waste gas outlets Z, m, from the recuperator, the intakes foifcold air are provided. One a is provided for each half ofthepfurnace and is adapted to" branch into two up lues Vs which communicatewi'th two longitudinal recnperator lues p extending inopposite directions, one toward the end and the other toward the center of the furnace. At the center'of the furnace the longitudinal air recuperator fines ofthe two half'systems may, if desired, l"

`air to' the working chamber in the vicinity of, and preferably above, the gas admission Each ascending flue t may feed two vports 10 for whichpurpose it may be of fT-ferm in elevation. The air ports as well as the gas ports being individually regralong ,the length of the' furnace to supply ulable, more or less heat can be imparted to tem.

Vhat I claim as my invention and desire to secure by- LettersgPatent is v Y 1. A furnace, including an elongated working chamber, a sectionalized recuperator system arranged below said working chamber and means for admitting waste gas from different portions of said working chamber to said recuperator systemY at a plurality of points in the length of the furnace, the waste gas in the recuperator system flowing in opposed directions.

2. A furnace, including an elongated working chamber, a sectionalized recuperator system arranged below said working chamber, means lfor admitting waste gas from different portions of said working chamber to said recuperator system at a plurality of points in the length of the furnace, the waste `gas in the recuperator Asystem flowing in opposed directions and means for admitting cold air to the recuperator system at a plurality of positions intermedlate the admissions of waste gas. l Y

3. A- furnace, including an elongated working chamber, a sectionalized recuperator system arranged belowsaid working chamber, means for admitting waste gas from said working chamber to said recuperator system at a plurality of points in the length of the furnace, the waste gas in sections of the recuperator system flowing in opposed directions, means for admitting cold air to the .recuperator system at a plurality of positions intermediate the admissions of waste gas, a longitudinal gas flue interposed betweensaid recuperator system and the working chamber and in communication with the latter, and a plurality of gas pro-v ducers communicating with said longitudinal flue.

4. A furnace, including an elongated working chamber, a sectionalized recuperator system arranged below said working chamber, means for admitting waste gas from said working chamber to said recuperator system at a plurality of points in the length of the furnace, the waste gas in sections of the recuperator system flowing in opposed directions, means for admitting cold air to the recuperator system at a plurality of positionsv intermediate the admissions of waste gas, a longitudinal gas flue interposed between said recuperator system and the working chamber, a series of ports establishing communication between said longitudinal gas flue and one side of the working chamber, and a plurality of gas producers 5. A furnace, including an elongated Vworking chamber, a sectionalized recuperator system arranged below said working chamber, a series of ports extending upwardly of said recuperator system to said working chamber, to permit admission of waste gas to said recuperator system at a.

plurality of points in the length of the furnace, the waste gas in sections of the recuperator system flowing in opposed directions, means for admitting cold air tothe recuperator system ata plurality of positions intermediatethe admissionV of waste gas, a longitudinal gas `flue interposed lbetween said recuperator systemv and the workingchamber andl in communication with the latter, and a plurality of gas producers communicating with the longitudinal flue.

6. Al furnace, including an elongated working chamber, a. sectionalized recuperator system arranged below said working Vcha-mber, a series of ports extending upwardly of said recuperator system to said working chamber to permit the admission of ywaste gas to said recuperator system at a plurality of points in the length of the furnace, the waste gas in sections of the recuperator system flowing in opposed directions, means for admitting cold airrto the recuperator system at a plurality of positionsr inter- 7. A furnace, including. an elongated Vworking chamber, a sectionalized recuperator system arranged below said working chamber, a series of individually regulable ports extending upwardlyy of said recuperator system to said working chamber, to permit admission of waste gas to-said recuperator system at a plurality of points in the length of the furnace, the waste'gas in sections of the recuperatorsystem flowing in opposed directions, means for admitting cold air to the recuperator system at a plurality of positions intermediate the admission of -waste gas, a. longitudinal gas flue interposed between said recuperator system and the working chamber and in communication with the latter, and a plurality of gas producers communicating with the longitudinal flue.

8. A furnace, including an elongated working chamber, a sectionalized recuperator system arranged below said working chamber, 'a series of ports extending upwardly of said recuperator system to said working chamber to permitv the admission of waste gas to said lrecuperator system'at, a plurality of points in the length of the furnace, the Waste gas in sections of the recuperator system owing in opposed directions, means for admitting` cold air to the recuperator system at a plurality of positions intermediate the admission of Waste gas, a longitudinal gas flue interposed between said recuperator system and the Working Chamber,

a series of individually regulable ports interconnecting said flue and said Working chamber, and a plurality of gas producers communicating with said longitudinal iue.

In Witness whereof I have hereunto set my hand.

ALFRED SMALLWOOD. 

